1969 was the last year fro the 170. It was replaced by the 198 in 1970.
FYI: the 170 was the base engine in the Valiant, Lancer, and "A" body Dart, untill 1969. The 225 was the optional six cyl. The 64-69 Barracuda the 225 was the base engine. the 170 was not available from the factory in these cars.
On my 66 Cuda I replaced a 360 with the 170. The car was born with a 273 2bbl.
